JGB37-31ZY DC Gear Motor, 12V/24V, 10–1270 RPM, 37mm Metal Gearbox and 6mm D-Shaft
JGB37-31ZY DC Gear Motor, 12V/24V, 10–1270 RPM, 37mm Metal Gearbox and 6mm D-Shaft
Jiali Motor
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JGB37-31ZY Brushed DC Gear Motor
The JGB37-31ZY is a compact brushed DC gear motor with a metal reduction gearbox, a 6mm D-shaped output shaft and reversible rotation. Choose a 12V or 24V motor, the required no-load output speed, and a motor-only or accessory package for robotics, small mechanisms and electronics projects.
The selectable speeds are 10, 16, 30, 48, 61, 89, 143, 267, 421, 800 and 1270 RPM. These options match the supplier's 8000RPM motor-before-reduction series. Output RPM is measured without load; speed decreases under load. A bracket shown in a photograph is included only when the selected Package names a bracket.
Construction and Speed Control
- Metal reduction gears in a multi-stage arrangement, copper winding, permanent-magnet motor and carbon brushes.
- PWM speed control is possible with a compatible external brushed-DC controller. A controller is included only in the specified packages.
- For the bare two-terminal motor, reversing motor-lead polarity reverses rotation. With a controller fitted, use its direction control and keep controller supply polarity correct.
- The gear ratio determines the speed/torque trade-off. Reducing speed electrically does not provide the same torque increase as selecting a higher reduction ratio.
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Brand / model | Jiali Motor / JGB37-31ZY |
| Motor type | Brushed DC gear motor; no encoder specified |
| Rated supply | 12V DC or 24V DC, according to selected variant |
| No-load speed before reduction | 8000RPM |
| Gearbox diameter | 37mm |
| Motor body | 31mm diameter × 57mm length |
| Gearbox length L | 19–29mm, depending on reduction ratio |
| Output shaft | 6mm diameter, 15.5mm projection; 12mm flat length; 5.5mm across flat |
| Shaft diameter tolerance | −0.03 / −0.05mm, as marked on the drawing |
| Locating boss | 12mm diameter × 6mm height |
| Front mounting | Six M3 threaded holes, 4mm deep, on a 31mm pitch circle |
| Shaft centre offset | 7mm from motor centreline, as marked on the drawing |
| Rear drawing references | 12mm rear boss diameter × 2mm projection; rear shaft diameter 2.95mm, with 3mm total rear projection |
| Reduction ratio | 6.3:1–810:1 |
| Motor-only weight | Approximately 250–280g according to ratio; overview states approximately 280g |
| Rated current / power | 12V: 1A / 12W; 24V: 0.6A / 14.4W, per supplier performance table |
| Supplier operating claims | −10°C to 70°C; overview lists 24-hour use. Actual duty suitability depends on load and cooling. |
| Noise | Supplier states approximately 55dB, varying with speed and load; measurement conditions are not specified |
Dimensions are supplier reference measurements and may vary. Motor appearance and components can differ between versions. No encoder, controller input-frequency specification or closed-loop positioning function is specified.
Performance by Voltage and Gear Ratio
Output speeds below are no-load speeds. Loaded speeds and torque are listed at the supplier maximum-efficiency operating point. Values are supplier data, not independent test results. Torque is in kgf·cm, not kilograms of lifting capacity. Stall values are limits, not continuous operating ratings.
12V — 8000RPM Before Reduction
| Ratio | Gearbox L (mm) | No-load RPM | No-load current (A) | Loaded RPM | Torque at max. efficiency (kgf·cm) | Loaded current (A) | Power (W) | Stall torque (kgf·cm) | Stall current (A) | Stall power (W) | Motor weight (g) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 6.3 | 19 | 1270 | 0.25 | 1000 | 0.3 | 1 | 12 | 1.5 | 5 | 60 | 250 |
| 10 | 19 | 800 | 0.25 | 640 | 0.5 | 1 | 12 | 2.6 | 5 | 60 | 250 |
| 19 | 22 | 421 | 0.25 | 340 | 1 | 1 | 12 | 5 | 5 | 60 | 255 |
| 30 | 22 | 267 | 0.25 | 210 | 1.5 | 1 | 12 | 9 | 5 | 60 | 255 |
| 56 | 24 | 143 | 0.25 | 113 | 3.2 | 1 | 12 | 16 | 5 | 60 | 265 |
| 90 | 24 | 89 | 0.25 | 71 | 5 | 1 | 12 | 25 | 5 | 60 | 265 |
| 131 | 26.5 | 61 | 0.25 | 49 | 6.5 | 1 | 12 | 33 | 5 | 60 | 272 |
| 168 | 26.5 | 48 | 0.25 | 39 | 8.5 | 1 | 12 | 38 | 5 | 60 | 272 |
| 270 | 26.5 | 30 | 0.25 | 24 | 12 | 1 | 12 | 43 | 5 | 60 | 272 |
| 506 | 29 | 16 | 0.25 | 13 | 25 | 1 | 12 | 50 | 5 | 60 | 280 |
| 810 | 29 | 10 | 0.25 | 8 | 35 | 1 | 12 | 65 | 5 | 60 | 280 |
24V — 8000RPM Before Reduction
| Ratio | Gearbox L (mm) | No-load RPM | No-load current (A) | Loaded RPM | Torque at max. efficiency (kgf·cm) | Loaded current (A) | Power (W) | Stall torque (kgf·cm) | Stall current (A) | Stall power (W) | Motor weight (g) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 6.3 | 19 | 1270 | 0.12 | 1000 | 0.5 | 0.6 | 14.4 | 2.8 | 3.2 | 76.8 | 250 |
| 10 | 19 | 800 | 0.12 | 640 | 1.2 | 0.6 | 14.4 | 5.5 | 3.2 | 76.8 | 250 |
| 19 | 22 | 421 | 0.12 | 340 | 2.5 | 0.6 | 14.4 | 10 | 3.2 | 76.8 | 255 |
| 30 | 22 | 267 | 0.12 | 210 | 4.5 | 0.6 | 14.4 | 16 | 3.2 | 76.8 | 255 |
| 56 | 24 | 143 | 0.12 | 113 | 6 | 0.6 | 14.4 | 25 | 3.2 | 76.8 | 265 |
| 90 | 24 | 89 | 0.12 | 71 | 8 | 0.6 | 14.4 | 32 | 3.2 | 76.8 | 265 |
| 131 | 26.5 | 61 | 0.12 | 49 | 12 | 0.6 | 14.4 | 35 | 3.2 | 76.8 | 272 |
| 168 | 26.5 | 48 | 0.12 | 39 | 16 | 0.6 | 14.4 | 40 | 3.2 | 76.8 | 272 |
| 270 | 26.5 | 30 | 0.12 | 24 | 25 | 0.6 | 14.4 | 45 | 3.2 | 76.8 | 272 |
| 506 | 29 | 16 | 0.12 | 13 | 32 | 0.6 | 14.4 | 55 | 3.2 | 76.8 | 280 |
| 810 | 29 | 10 | 0.12 | 8 | 35 | 0.6 | 14.4 | 70 | 3.2 | 76.8 | 280 |
Optional Mounting Bracket
The illustrated L-bracket is 1.5mm thick, approximately 40mm wide, with a 40mm base and 47mm upright. The motor mounting pattern is marked 31mm pitch diameter with six 3.2mm holes and 6.3mm recesses. The central opening is marked 2 × R6.5 with 14mm centre spacing. The base drawing shows four 3.5mm holes at 24 × 30mm spacing and an 8mm side offset; the upright includes a 20mm reference dimension. The bracket is supplied only with the applicable Package.
Wiring and Use
Use a DC supply matching the selected motor voltage; never connect the motor directly to AC mains. In the illustrated controller arrangement, connect the supply to the controller's power input with correct polarity, and connect the controller motor output to the two motor terminals. The illustration shows red positive and black negative motor leads, a speed knob, a reversing switch and a DC power supply connection. Confirm actual terminal labels before powering on. Never reverse the controller's power input to reverse the motor, and stop the motor before changing direction.
Choose the motor by its rated-load torque rather than its stall torque. Do not overload, stall or operate close to stall: the motor or gears can be damaged. Loads above the rated condition reduce speed. Lowering electrical speed can also reduce available torque. Controller ratings, adapter mains-input rating, plug type and included cable/connector details are not fully specified in the supplied listing; verify these details for the selected accessories.
Torque and Unit Reference
For a static load, required torque in kgf·cm equals load in kgf multiplied by lever radius in cm. The supplier illustrates a 10kg load: 10kgf·cm at a 1cm radius, or 100kgf·cm at a 10cm radius. This is an explanatory example, not this motor's lifting rating. Allow for friction, acceleration and the mechanism's actual operating load.
| gf·cm | kgf·cm | N·m | mN·m | N·cm |
|---|---|---|---|---|
| 1 | 0.001 | 9.8e-05 | 0.098 | 0.0098 |
| 1000 | 1 | 0.098 | 98 | 9.8 |
| 10204.08 | 10.204 | 1 | 1000 | 100 |
| 10.2 | 0.01 | 0.001 | 1 | 0.1 |
| 102.04 | 0.102 | 0.01 | 10 | 1 |
Package Contents
One JGB37-31ZY motor in the selected voltage and speed, plus only the accessories named in the Package option:
- Motor Only
- Motor + Bracket
- Motor + Speed Controller
- Motor + Power Supply
- Motor + Bracket + Speed Controller
- Motor + Bracket + Power Supply
- Motor + Speed Controller + Power Supply
- Motor + Bracket + Speed Controller + Power Supply
Motor Only does not include a bracket, speed controller or power supply. Product and accessory illustrations are reference views.
Details
English versions of the supplier illustrations, with explanations and series-specific reference notes.
Motor Dimensions
All dimensions are in millimetres. The motor body is 31mm in diameter and 57mm long; gearbox length L varies with the reduction ratio.
Optional Mounting Bracket
The bracket is included only in packages that name a bracket. Check the mounting pattern and clearance for your mechanism.
Motor Specifications
The source photograph shows the output shaft, mounting holes and rear shaft. Motor weight varies from approximately 250g to 280g according to ratio.
Speed Controller Wiring
Use a 12V or 24V DC motor supply matching the selected variant. Never connect the motor directly to AC mains. Observe controller input polarity and stop the motor before reversing direction.
